Lieselotte Anderwald 
Negation in Non-Standard British English [PDF ebook] 
Gaps, Regularizations and Asymmetries

Despite the advances of radio and television and increasing mobility and urbanization, spoken English is by no means becoming more like the written standard. English dialect grammar, however, is still a new and relatively undeveloped area of research, and most studies to date are either restricted regionally, or based on impressionistic statements. This book provides the first thorough empirical study of the field of non-standard negation across Great Britain.